ゲームライブラリ構築までの道「インベーダー編」#10 : トーチカの当たり判定

Posted on 2020/07/29 by 下駄

Pocket

Check

こんにちわ。

AppleWatchでアセモができるので、左右交互の腕に付けている、下駄です。

スマホはiPhone、仕事で使うノートブックはMacBook、Applewatch、AirPodPro、iPadPro + ApplePenCil・・・

もはや、生活にAppleが欠かせない状態です。

ブランドで統一すると、便利な点も多いので、生活が一変しますよね。

でも、まあまあ金はかかりますが・・・

本日のIT謎掛け

「AppleWatch」と、かけまして、

「総務省が公開している資料」と、ときます。

そのココロは・・・

便利な、トケイ（時計と統計）です。

ソースコード

(function(w,d){

  var __options = {
    canvas_size : { x : null , y : null },
    bitmap_size : { w : 48 , h : 48},

    cannon : {
      color : "#57F2D6",
      bitSize : 4,
      src   : "images/dot/cannon.dot",
      x : 0 , y : 0,
      moveX : 10
    },
    ufo : {
      color : "white",
      src   : "images/dot/ufo.dot",
      x : 0 , y : 0,
      moveX : 10
    },
    bullet : {
      color : "white",
      src   : "images/dot/bullet.dot",
      x : 0 , y : 0,
      moveX : 10
    },
    invader_effect_1 : {
      color : "white",
      src   : "images/dot/invader_effect_1.dot",
      x : 0 , y : 0,
    },

    tochika : {
      color : "red",
      src   : "images/dot/tochika.dot",
      w     : 72,
      rate  : 2.5
    },
    
    invader_src : {
      "crab" : [
        'images/dot/crab_1.dot',
        "images/dot/crab_2.dot"
      ],
      "octpus" : [
        "images/dot/octpus_1.dot",
        "images/dot/octpus_2.dot"
      ],
      "squid" : [
        "images/dot/squid_1.dot",
        "images/dot/squid_2.dot"
      ]
    },
    invader_row_infos : [
      { invader : "squid" , color : "#68F205"},
      { invader : "crab"  , color : "#68F205"},
      { invader : "crab"  , color : "#57F2D6"},
      { invader : "octpus", color : "#57F2D6"},
      { invader : "octpus", color : "#F22786"}
    ],
    invader_config : {
      type   : "invader",
      margin : 10, // display-margin
      move_x : 4, // [1:right , -1:left]
      move_y : 4
    }
  };

  var MAIN = function(canvas_selector){
    this.canvas_selector = canvas_selector || "canvas";
    this.shoots = [];
    this.pattern = 0;

    this.setCanvas(this.canvas_selector);
    this.set_imageMax();
    this.event_set();
    this.bitmap_load();
    this.view();
    this.animation_roop();
  };

  MAIN.prototype.setCanvas = function(selector){
    this.canvas_elm = d.querySelector(selector);
    if(!this.canvas_elm){return;}
    this.canvas_elm.style.setProperty("background-color","black","");
    
    if(w.innerWidth < this.canvas_elm.offsetWidth){
      this.canvas_elm.setAttribute("width" , w.innerWidth);
    }
    if(w.innerHeight < this.canvas_elm.offsetHeight){
      this.canvas_elm.setAttribute("height" , w.innerHeight);
    }

    __options.canvas_size.x = this.canvas_elm.offsetWidth;
    __options.canvas_size.y = this.canvas_elm.offsetHeight;
    __options.cannon.y      = __options.canvas_size.y - 100;

    // smooth-off
    this.ctx = this.canvas_elm.getContext("2d");
    this.ctx.imageSmoothingEnabled       = false;
    this.ctx.mozImageSmoothingEnabled    = false;
    this.ctx.webkitImageSmoothingEnabled = false;
    this.ctx.msImageSmoothingEnabled     = false;
  };

  

  MAIN.prototype.clear = function(){
    this.ctx.clearRect(0, 0,  this.canvas_elm.width,  this.canvas_elm.height);
  };

  MAIN.prototype.bitmap_load = function(){
    var bitmap_files = [];
    for(var i in __options.invader_src){
      for(var j=0; j<__options.invader_src[i].length; j++){
        bitmap_files.push(__options.invader_src[i][j]);
      }
    }
    for(var i=0; i<bitmap_files.length; i++){
      this.image_bit_set(bitmap_files[i]);
    }
    this.image_bit_set(__options.cannon.src);
    this.image_bit_set(__options.ufo.src);
    this.image_bit_set(__options.bullet.src);
    this.image_bit_set(__options.invader_effect_1.src);
    this.image_bit_set(__options.tochika.src , __options.tochika.w);
  };

  MAIN.prototype.view = function(){
    // invader
    this.view_invader();

    // canon
    this.image(__options.cannon);

    // tochika
    this.view_tochika();
  }

  MAIN.prototype.view_invader = function(){
    if(typeof __options.invaders === "undefined"){
      this.init_invaders_info();
    }
    for(var i in __options.invaders){
      for(var j in __options.invaders[i]){
        if(typeof __options.invaders[i][j][0].shoot_flg !== "undefined"){
          if(__options.invaders[i][j][0].shoot_flg <= 2){
            __options.invaders[i][j][0].shoot_flg++;
          }
          else{
            __options.invaders[i].splice(j,1);
            continue;
          }
        }
        this.image(__options.invaders[i][j][this.pattern]);
      }
    }
  };

  MAIN.prototype.view_tochika = function(){
    if(typeof this.image_cache[__options.tochika.src] === "undefined"
    || typeof this.image_cache[__options.tochika.src].bitmap === "undefined"
    || !this.image_cache[__options.tochika.src].bitmap.length){return;}
    if(typeof __options.tochikas === "undefined"){
      this.init_tochilas_info();
    }
    // 配置間隔
    var rate = __options.tochika.rate;
    // 配置計算
    var tochika_count = Math.floor(this.canvas_elm.offsetWidth / (__options.tochika.w * rate));
    var margin = (this.canvas_elm.offsetWidth - ((__options.tochika.w * rate) * tochika_count)) / 2;
    var centering = __options.tochika.w * (rate - 1) /2;
    var y = this.canvas_elm.offsetHeight - 170;
    for(var i in __options.tochikas){
      __options.tochikas[i].x = margin + ((__options.tochika.w * rate) * i) + centering;
      __options.tochikas[i].y = y;
      __options.tochikas[i].bitsize = __options.tochikas[i].bitsize || this.image_cache[__options.tochika.src].bitsize;
      __options.tochikas[i].h = __options.tochikas[i].bitsize * __options.tochikas[i].bitmap.length;
      this.image(__options.tochikas[i]);
    }
  };

  MAIN.prototype.init_invaders_info = function(){
    // 配置マージン
    margin = __options.invader_config.margin;
    // 配置個数（w）
    var count_w = Math.floor((__options.canvas_size.x - margin * 2) / __options.bitmap_size.w) -2;

    // 敵機配置情報作成
    __options.invaders = [];
    for(var i=0; i<__options.invader_row_infos.length; i++){
      var type = __options.invader_row_infos[i].invader;
      __options.invaders[i] = [];
      var srcs = __options.invader_src[type];
      for(var j=0; j<count_w; j++){
        __options.invaders[i][j] = [];
        for(var k=0; k<srcs.length; k++){
          __options.invaders[i][j][k] = {
            color : __options.invader_row_infos[i].color,
            x     : (j * __options.bitmap_size.w) + margin,
            y     : (i * __options.bitmap_size.h) + margin,
            type  : type,
            src   : srcs[k]
          };
        }
      }
    }
  };
  MAIN.prototype.init_tochilas_info = function(){
    __options.tochikas = [];
    var rate = __options.tochika.rate;
    var tochika_count = Math.floor(this.canvas_elm.offsetWidth / (__options.tochika.w * rate));
    var bitmap = this.image_cache[__options.tochika.src].bitmap;
    for(var i=0; i<tochika_count; i++){
      __options.tochikas.push({
        src     : __options.tochika.src,
        color   : __options.tochika.color,
        bitmap  : JSON.parse(JSON.stringify(bitmap))
      });
    }
  };

  MAIN.prototype.image_cache = [];
  MAIN.prototype.image = function(options){
    if(!this.canvas_elm){return;}
    if(!options){return;}
    if(typeof this.image_cache[options.src] === "undefined"){return}
    var bitmap  = this.get_bitmap(options);
    var bitsize = this.get_bitsize(options);
    this.image_bit_make(bitmap , bitsize , options.color , options.x , options.y);
  };

  MAIN.prototype.get_bitmap = function(option){
    if(typeof option.bitmap !== "undefined"){
      return option.bitmap;
    }
    else if(typeof this.image_cache[option.src] !== "undefined"
    && typeof this.image_cache[option.src].bitmap !== "undefined"){
      return this.image_cache[option.src].bitmap;
    }
  };
  MAIN.prototype.get_bitsize = function(option){
    if(typeof this.image_cache[option.src] !== "undefined"
    || typeof this.image_cache[option.src].bitsize !== "undefined"){
      return this.image_cache[option.src].bitsize;
    }
  };

  MAIN.prototype.image_bit_set = function(src , bitmap_size){
    if(typeof this.image_cache[src] !== "undefined"){return;}
    bitmap_size = bitmap_size || __options.bitmap_size.w;
    this.image_cache[src] = {
      bitsize : 0,
      bitmap  : []
    };
    new AJAX({
      url       : src,
      methdo    : "GET",
      async     : true,
      onSuccess : (function(src , bitmap_size , data){
        this.image_bit_loaded(src , bitmap_size , data);
      }).bind(this , src , bitmap_size)
    });
  };
  MAIN.prototype.image_bit_loaded = function(src , bitmap_size , data){
    var char16    = data.split("\n");
    var str_count = char16[0].length * 4;
    var size      = bitmap_size / str_count;
    // ゼロパディング用桁数算出
    var zero = new Array(str_count).fill("0").join("")
    for(var i in char16){
      // 16進数を２進数に変換
      var char2 = parseInt(char16[i] , 16).toString(2);
      // サイズ取得
      this.image_cache[src].bitsize = size;
      char2 = (zero + char2).slice(-str_count);
      this.image_cache[src].bitmap.push(char2);
    }
  };
  MAIN.prototype.image_bit_make = function(bitmap , bitsize , color , x , y){
    if(!bitmap){return;}
    color = color || "white";
    this.ctx.fillStyle = color;
    for(var i=0; i<bitmap.length; i++){
      for(var j=0; j<bitmap[i].length; j++){
        var bit = bitmap[i].charAt(j);
        if(bit == 0){continue;}
        var w = bitsize;
        var h = bitsize;
        this.ctx.fillRect(x+(j * w) , y+(i * h) , Math.ceil(w) , Math.ceil(h));
      }
    }
  };

  MAIN.prototype.animation_roop = function(time){
    var func = (function(e){this.animation(e)}).bind(this);

    this.animation_proc();

    if(window.requestAnimationFrame
    ||  window.webkitRequestAnimationFrame
    ||  window.mozRequestAnimationFrame
    ||  window.oRequestAnimationFrame
    ||  window.msRequestAnimationFrame){
      window.requestAnimationFrame(func);
    }
    else{
      time = time || 10;
      anim_flg = setTimeout(func , time);
    }
  };

  MAIN.prototype.animation_proc = function(){
    switch(this.keydown_flg){
      case "right":
        this.cannon_move(__options.cannon.x + __options.cannon.moveX);
        break;
      case "left":
        this.cannon_move(__options.cannon.x - __options.cannon.moveX);
        break;
    }
    this.animation_shoot();
  };

  MAIN.prototype.animation_shoot = function(){
    if(!this.shoots.length){return;}
    for(var i in this.shoots){
      var w = 1 * __options.cannon.bitSize;
      var h = 2 * __options.cannon.bitSize;
      // collision
      if(this.shoot_collision_tochika(this.shoots[i].x , this.shoots[i].y , w , h)){
        this.shoots.splice(i,1);
      }
      else if(this.shoot_collision_invader(this.shoots[i].x , this.shoots[i].y , w , h)){
        this.shoots.splice(i,1);
      }
      else if(this.shoots[i].y < h){
        this.shoots.splice(i,1);
      }
      else{
        this.ctx.fillStyle   = "white";
        this.ctx.fillRect(this.shoots[i].x - __options.cannon.bitSize , this.shoots[i].y , w , h);
        this.shoots[i].y -= __options.cannon.bitSize * 2;
      }
    }
  };

  MAIN.prototype.shoot_collision_invader = function(x , y , w , h){
    var inv = __options.invaders;
    for(var i in inv){
      for(var j in inv[i]){
        var ix = inv[i][j][0].x;
        var iy = inv[i][j][0].y;
        var iw = __options.bitmap_size.w;
        var ih = __options.bitmap_size.h;
        if(ix <= x && x <= ix + iw
        && iy <= y - h && y <= iy + ih){
          for(var k=0; k<inv[i][j].length; k++){
            inv[i][j][k].src = __options.invader_effect_1.src;
            inv[i][j][k].shoot_flg = 1;
          }
          return true;
        }
      }
    }
  };

  MAIN.prototype.shoot_collision_tochika = function(x , y , w , h){
    for(var i in __options.tochikas){
      var tx = __options.tochikas[i].x;
      var ty = __options.tochikas[i].y;
      var tw = __options.tochika.w;
      var th = __options.tochikas[i].h;
      if(tx <= x && x + w <= tx + tw
      && ty <= y + h && y <= ty + th){
        return this.tochika_scrape_shoot(__options.tochikas[i] , x , y);
      }
    }
  };

  MAIN.prototype.tochika_scrape_shoot = function(tochika_data , shoot_x , shoot_y){
    // 衝突したtochikaの下部分を検出
    var x = shoot_x - tochika_data.x;
    var y = shoot_y - tochika_data.y;
    var dot_x = parseInt(x / tochika_data.bitsize , 10);
    var dot_y = parseInt(y / tochika_data.bitsize , 10);
    // 当たった座標のドット部分を選択
    if(tochika_data.bitmap[dot_y][dot_x] == 1){
      // 衝突箇所以下を削除
      for(var i=tochika_data.bitmap.length-1; i>=dot_y; i--){
        if(tochika_data.bitmap[i][dot_x] != 1){continue;}
        var str = tochika_data.bitmap[i];
        tochika_data.bitmap[i] = str.slice(0,dot_x).concat("0",str.slice(dot_x+1));
        return true;
      }
    }
    // for(var i=tochika_data.bitmap.length-1; i>=0; i--){
    //   console.log();
    //   if(tochika_data.bitmap[i][dot_x] != 1){continue;}
    //   // bitmapから下2ドット分を削除
    //   var str = tochika_data.bitmap[i];
    //   tochika_data.bitmap[i] = str.slice(0,dot_x).concat("0",str.slice(dot_x+1));
    //   // tochika_data.bitmap[i] = "000000000000000000000000";
    //   // tochika_data.bitmap[i-1][dot_x] = 0;
    //   return true;
    // }
    return false;
  };

  MAIN.prototype.cannon_move = function(pos){
    if(pos < 0){
      pos = 0;
    }
    else if(pos > this.canvas_elm.offsetWidth - __options.bitmap_size.w){
      pos = this.canvas_elm.offsetWidth - __options.bitmap_size.w;
    }
    __options.cannon.x = pos;
  };

  MAIN.prototype.animation = function(){
    this.clear();
    this.nextPattern(300);
    this.view();
    this.animation_roop(30);
  }
  MAIN.prototype.nextPattern = function(frame_rate){
    this.prev_time = this.prev_time || 0;
    if((+new Date()) - this.prev_time < frame_rate){return}
    this.prev_time = (+new Date());

    this.pattern++;
    if(this.pattern >= this.image_max){
      this.pattern = 0;
    }

    this.invader_move();
  };

  MAIN.prototype.invader_move = function(){
    // 左端の情報取得
    var window_min = __options.invader_config.margin;
    var window_max = this.canvas_elm.offsetWidth - __options.invader_config.margin;
    var pos        = this.invader_pos();
    var move_x     = __options.invader_config.move_x;
    var move_y     = 0;
    var w          = __options.bitmap_size.w;

    // move y
    if(typeof this.move_y_count !== "undefined" && this.move_y_count > 0){
      this.move_y_count -= 1;
      move_y = __options.invader_config.move_y;
      move_x = 0;
    }
    // Dead end ->
    else if(move_x > 0 && pos.max > window_max){
      // move_x = window_max - pos.max;
      this.move_y_count = 1;
      __options.invader_config.move_x = -__options.invader_config.move_x;
      move_x = 0;
      move_y = __options.invader_config.move_y;
    }
    // <- Dead end
    else if(move_x < 0 && pos.min < window_min){
      // move_x = window_min - pos.min;
      this.move_y_count = 1;
      __options.invader_config.move_x = -__options.invader_config.move_x;
      move_x = 0;
      move_y = __options.invader_config.move_y;
    }
    this.invader_move_set(move_x , move_y);
  };

  // mode @ [min : 一番左端のinvaderの座標を取得 . max : 一番右端のinvaderの座標を取得]
  MAIN.prototype.invader_pos = function(mode){
    var min = null;
    var max = null;
    var inv = __options.invaders;
    var w   = __options.bitmap_size.w;
    for(var i in inv){
      for(var j in inv[i]){
        if(min === null || min > inv[i][j][0].x){
          min = inv[i][j][0].x;
        }
        if(max === null || max < inv[i][j][0].x + w){
          max = inv[i][j][0].x + w;
        }
      }
    }
    if(mode === "min"){
      return min;
    }
    else if(mode === "max"){
      return max;
    }
    else{
      return {min : min , max : max};
    }
  };

  MAIN.prototype.invader_move_set = function(x,y){
    var inv = __options.invaders;
    var w   = __options.bitmap_size.w;
    for(var i in inv){
      for(var j in inv[i]){
        for(var k in inv[i][j]){
          inv[i][j][k].x += x;
          inv[i][j][k].y += y;
        }
      }
    }
  };


  MAIN.prototype.set_imageMax = function(){
    for(var i in __options.invader_src){
      this.image_max = __options.invader_src[i].length;
      break;
    }
  };

  /* Event */
  MAIN.prototype.event_set = function(){
    new LIB().event(w , "click"      , (function(e){this.click(e)}).bind(this));
    new LIB().event(w , "keydown"    , (function(e){this.keydown(e)}).bind(this));
    new LIB().event(w , "keyup"      , (function(e){this.keyup(e)}).bind(this));
    new LIB().event(w , "mousemove"  , (function(e){this.mousemove(e)}).bind(this));
    new LIB().event(w , "touchmove"  , (function(e){this.touchmove(e)}).bind(this));
    new LIB().event(w , "touchend"   , (function(e){this.touchend(e)}).bind(this));
  };

  MAIN.prototype.click = function(e){
    this.shoot_add();
  };

  MAIN.prototype.shoot_add = function(){
    if(this.shoots.length < 2){
      this.shoots.push({
        x : __options.cannon.x + (__options.bitmap_size.w / 2),
        y : __options.cannon.y + (__options.cannon.bitSize * 4)
      });
    }
  };

  MAIN.prototype.keydown = function(e){
    switch(e.keyCode){
      case 37:  // <-
      case 'ArrowLeft':
      this.keydown_flg = "left";
      break;

      case 39:  // ->
      case 'ArrowRight':
      this.keydown_flg = "right";
      break;

      case 32:  // space
      this.shoot_add();
      break;
    }
  };

  MAIN.prototype.keyup = function(e){
    this.keydown_flg = false;
  };

  MAIN.prototype.mousemove = function(e){
    // if(this.flg_gamestart !== true){return;}

    this.mousePos = this.mousePos || e.clientX;
    this.cannon_move(__options.cannon.x + (e.clientX - this.mousePos));
    this.mousePos = e.clientX;
  };

  MAIN.prototype.touchmove = function(e){
    // if(this.flg_gamestart !== true){return;}

    if(!e || !e.touches || e.touches.length > 1){
      this.mousePos = null;
      return;
    }
    this.mousePos = typeof this.mousePos === "number" ? this.mousePos : e.touches[0].clientX;
    this.cannon_move(__options.cannon.x + (e.touches[0].clientX - this.mousePos));
    this.mousePos = e.touches[0].clientX;
  };
  MAIN.prototype.touchend = function(e){
    this.mousePos = null;
  };





  var LIB  = function(){};

  LIB.prototype.event = function(target, mode, func , flg){
    flg = (flg) ? flg : false;
    if (target.addEventListener){target.addEventListener(mode, func, flg)}
    else{target.attachEvent('on' + mode, function(){func.call(target , window.event)})}
  };

  var AJAX = function(option){
    if(!option){return}
		var httpoj = this.createHttpRequest();
    if(!httpoj){return;}
    
		// var option = new MAIN().setOption(options);
		var data   = this.setQuery(option);
		if(!data.length){
			option.method = "get";
		}

		httpoj.open( option.method , option.url , option.async );
    httpoj.setRequestHeader('Content-Type', option.type);
		
		httpoj.onreadystatechange = function(){
			if (this.readyState==4 && httpoj.status == 200){
				option.onSuccess(this.responseText);
			}
		};

		// FormData 送信用
		if(typeof option.form === "object" && Object.keys(option.form).length){
			httpoj.send(option.form);
		}
		// query整形後 送信
		else{
			if(data.length){
				httpoj.send(data.join("&"));
			}
			else{
				httpoj.send();
			}
		}
  };
	AJAX.prototype.dataOption = {
		url:"",
		query:{},
		querys:[],
		data:{},
		form:{},
		async:"true",
		method:"POST",
		type:"application/x-www-form-urlencoded",
		onSuccess:function(res){},
		onError:function(res){}
	};
	AJAX.prototype.createHttpRequest = function(){
		//Win ie用
		if(window.ActiveXObject){
			//MSXML2以降用;
			try{return new ActiveXObject("Msxml2.XMLHTTP")}
			catch(e){
				//旧MSXML用;
				try{return new ActiveXObject("Microsoft.XMLHTTP")}
				catch(e2){return null}
			}
		}
		//Win ie以外のXMLHttpRequestオブジェクト実装ブラウザ用;
		else if(window.XMLHttpRequest){return new XMLHttpRequest()}
		else{return null}
  };
  // URL-Queryの作成
  AJAX.prototype.setQuery = function(option){
		var data = [];
		if(typeof option.datas !== "undefined"){
			for(var key of option.datas.keys()){
				data.push(key + "=" + option.datas.get(key));
			}
		}
		if(typeof option.query !== "undefined"){
			for(var i in option.query){
				data.push(i+"="+encodeURIComponent(option.query[i]));
			}
		}
		if(typeof option.querys !== "undefined"){
			for(var i=0;i<option.querys.length;i++){
				if(typeof option.querys[i] == "Array"){
					data.push(option.querys[i][0]+"="+encodeURIComponent(option.querys[i][1]));
				}
				else{
					var sp = option.querys[i].split("=");
					data.push(sp[0]+"="+encodeURIComponent(sp[1]));
				}
			}
		}
    return data;
  }





  new LIB().event(w , "load" , function(){new MAIN("#mycanvas")});
})(window,document);

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(function(w,d){

var __options = {

canvas_size : { x : null , y : null },

bitmap_size : { w : 48 , h : 48},

cannon : {

color : "#57F2D6",

bitSize : 4,

src : "images/dot/cannon.dot",

x : 0 , y : 0,

moveX : 10

ufo : {

color : "white",

src : "images/dot/ufo.dot",

x : 0 , y : 0,

moveX : 10

bullet : {

color : "white",

src : "images/dot/bullet.dot",

x : 0 , y : 0,

moveX : 10

invader_effect_1 : {

color : "white",

src : "images/dot/invader_effect_1.dot",

x : 0 , y : 0,

tochika : {

color : "red",

src : "images/dot/tochika.dot",

w : 72,

rate : 2.5

invader_src : {

"crab" : [

'images/dot/crab_1.dot',

"images/dot/crab_2.dot"

"octpus" : [

"images/dot/octpus_1.dot",

"images/dot/octpus_2.dot"

"squid" : [

"images/dot/squid_1.dot",

"images/dot/squid_2.dot"

]

invader_row_infos : [

{ invader : "squid" , color : "#68F205"},

{ invader : "crab" , color : "#68F205"},

{ invader : "crab" , color : "#57F2D6"},

{ invader : "octpus", color : "#57F2D6"},

{ invader : "octpus", color : "#F22786"}

invader_config : {

type : "invader",

margin : 10, // display-margin

move_x : 4, // [1:right , -1:left]

move_y : 4

}

};

var MAIN = function(canvas_selector){

this.canvas_selector = canvas_selector || "canvas";

this.shoots = [];

this.pattern = 0;

this.setCanvas(this.canvas_selector);

this.set_imageMax();

this.event_set();

this.bitmap_load();

this.view();

this.animation_roop();

};

MAIN.prototype.setCanvas = function(selector){

this.canvas_elm = d.querySelector(selector);

if(!this.canvas_elm){return;}

this.canvas_elm.style.setProperty("background-color","black","");

if(w.innerWidth < this.canvas_elm.offsetWidth){

this.canvas_elm.setAttribute("width" , w.innerWidth);

}

if(w.innerHeight < this.canvas_elm.offsetHeight){

this.canvas_elm.setAttribute("height" , w.innerHeight);

}

__options.canvas_size.x = this.canvas_elm.offsetWidth;

__options.canvas_size.y = this.canvas_elm.offsetHeight;

__options.cannon.y = __options.canvas_size.y - 100;

// smooth-off

this.ctx = this.canvas_elm.getContext("2d");

this.ctx.imageSmoothingEnabled = false;

this.ctx.mozImageSmoothingEnabled = false;

this.ctx.webkitImageSmoothingEnabled = false;

this.ctx.msImageSmoothingEnabled = false;

};

MAIN.prototype.clear = function(){

this.ctx.clearRect(0, 0, this.canvas_elm.width, this.canvas_elm.height);

};

MAIN.prototype.bitmap_load = function(){

var bitmap_files = [];

for(var i in __options.invader_src){

for(var j=0; j<__options.invader_src[i].length; j++){

bitmap_files.push(__options.invader_src[i][j]);

}

for(var i=0; i<bitmap_files.length; i++){

this.image_bit_set(bitmap_files[i]);

}

this.image_bit_set(__options.cannon.src);

this.image_bit_set(__options.ufo.src);

this.image_bit_set(__options.bullet.src);

this.image_bit_set(__options.invader_effect_1.src);

this.image_bit_set(__options.tochika.src , __options.tochika.w);

};

MAIN.prototype.view = function(){

// invader

this.view_invader();

// canon

this.image(__options.cannon);

// tochika

this.view_tochika();

}

MAIN.prototype.view_invader = function(){

if(typeof __options.invaders === "undefined"){

this.init_invaders_info();

}

for(var i in __options.invaders){

for(var j in __options.invaders[i]){

if(typeof __options.invaders[i][j][0].shoot_flg !== "undefined"){

if(__options.invaders[i][j][0].shoot_flg <= 2){

__options.invaders[i][j][0].shoot_flg++;

}

else{

__options.invaders[i].splice(j,1);

continue;

}

this.image(__options.invaders[i][j][this.pattern]);

}

};

MAIN.prototype.view_tochika = function(){

if(typeof this.image_cache[__options.tochika.src] === "undefined"

|| typeof this.image_cache[__options.tochika.src].bitmap === "undefined"

|| !this.image_cache[__options.tochika.src].bitmap.length){return;}

if(typeof __options.tochikas === "undefined"){

this.init_tochilas_info();

}

// 配置間隔

var rate = __options.tochika.rate;

// 配置計算

var tochika_count = Math.floor(this.canvas_elm.offsetWidth / (__options.tochika.w * rate));

var margin = (this.canvas_elm.offsetWidth - ((__options.tochika.w * rate) * tochika_count)) / 2;

var centering = __options.tochika.w * (rate - 1) /2;

var y = this.canvas_elm.offsetHeight - 170;

for(var i in __options.tochikas){

__options.tochikas[i].x = margin + ((__options.tochika.w * rate) * i) + centering;

__options.tochikas[i].y = y;

__options.tochikas[i].bitsize = __options.tochikas[i].bitsize || this.image_cache[__options.tochika.src].bitsize;

__options.tochikas[i].h = __options.tochikas[i].bitsize * __options.tochikas[i].bitmap.length;

this.image(__options.tochikas[i]);

}

};

MAIN.prototype.init_invaders_info = function(){

// 配置マージン

margin = __options.invader_config.margin;

// 配置個数（w）

var count_w = Math.floor((__options.canvas_size.x - margin * 2) / __options.bitmap_size.w) -2;

// 敵機配置情報作成

__options.invaders = [];

for(var i=0; i<__options.invader_row_infos.length; i++){

var type = __options.invader_row_infos[i].invader;

__options.invaders[i] = [];

var srcs = __options.invader_src[type];

for(var j=0; j<count_w; j++){

__options.invaders[i][j] = [];

for(var k=0; k<srcs.length; k++){

__options.invaders[i][j][k] = {

color : __options.invader_row_infos[i].color,

x : (j * __options.bitmap_size.w) + margin,

y : (i * __options.bitmap_size.h) + margin,

type : type,

src : srcs[k]

};

}

};

MAIN.prototype.init_tochilas_info = function(){

__options.tochikas = [];

var rate = __options.tochika.rate;

var tochika_count = Math.floor(this.canvas_elm.offsetWidth / (__options.tochika.w * rate));

var bitmap = this.image_cache[__options.tochika.src].bitmap;

for(var i=0; i<tochika_count; i++){

__options.tochikas.push({

src : __options.tochika.src,

color : __options.tochika.color,

bitmap : JSON.parse(JSON.stringify(bitmap))

});

}

};

MAIN.prototype.image_cache = [];

MAIN.prototype.image = function(options){

if(!this.canvas_elm){return;}

if(!options){return;}

if(typeof this.image_cache[options.src] === "undefined"){return}

var bitmap = this.get_bitmap(options);

var bitsize = this.get_bitsize(options);

this.image_bit_make(bitmap , bitsize , options.color , options.x , options.y);

};

MAIN.prototype.get_bitmap = function(option){

if(typeof option.bitmap !== "undefined"){

return option.bitmap;

}

else if(typeof this.image_cache[option.src] !== "undefined"

&& typeof this.image_cache[option.src].bitmap !== "undefined"){

return this.image_cache[option.src].bitmap;

}

};

MAIN.prototype.get_bitsize = function(option){

if(typeof this.image_cache[option.src] !== "undefined"

|| typeof this.image_cache[option.src].bitsize !== "undefined"){

return this.image_cache[option.src].bitsize;

}

};

MAIN.prototype.image_bit_set = function(src , bitmap_size){

if(typeof this.image_cache[src] !== "undefined"){return;}

bitmap_size = bitmap_size || __options.bitmap_size.w;

this.image_cache[src] = {

bitsize : 0,

bitmap : []

};

new AJAX({

url : src,

methdo : "GET",

async : true,

onSuccess : (function(src , bitmap_size , data){

this.image_bit_loaded(src , bitmap_size , data);

}).bind(this , src , bitmap_size)

});

};

MAIN.prototype.image_bit_loaded = function(src , bitmap_size , data){

var char16 = data.split("\n");

var str_count = char16[0].length * 4;

var size = bitmap_size / str_count;

// ゼロパディング用桁数算出

var zero = new Array(str_count).fill("0").join("")

for(var i in char16){

// 16進数を２進数に変換

var char2 = parseInt(char16[i] , 16).toString(2);

// サイズ取得

this.image_cache[src].bitsize = size;

char2 = (zero + char2).slice(-str_count);

this.image_cache[src].bitmap.push(char2);

}

};

MAIN.prototype.image_bit_make = function(bitmap , bitsize , color , x , y){

if(!bitmap){return;}

color = color || "white";

this.ctx.fillStyle = color;

for(var i=0; i<bitmap.length; i++){

for(var j=0; j<bitmap[i].length; j++){

var bit = bitmap[i].charAt(j);

if(bit == 0){continue;}

var w = bitsize;

var h = bitsize;

this.ctx.fillRect(x+(j * w) , y+(i * h) , Math.ceil(w) , Math.ceil(h));

}

};

MAIN.prototype.animation_roop = function(time){

var func = (function(e){this.animation(e)}).bind(this);

this.animation_proc();

if(window.requestAnimationFrame

|| window.webkitRequestAnimationFrame

|| window.mozRequestAnimationFrame

|| window.oRequestAnimationFrame

|| window.msRequestAnimationFrame){

window.requestAnimationFrame(func);

}

else{

time = time || 10;

anim_flg = setTimeout(func , time);

}

};

MAIN.prototype.animation_proc = function(){

switch(this.keydown_flg){

case "right":

this.cannon_move(__options.cannon.x + __options.cannon.moveX);

break;

case "left":

this.cannon_move(__options.cannon.x - __options.cannon.moveX);

break;

}

this.animation_shoot();

};

MAIN.prototype.animation_shoot = function(){

if(!this.shoots.length){return;}

for(var i in this.shoots){

var w = 1 * __options.cannon.bitSize;

var h = 2 * __options.cannon.bitSize;

// collision

if(this.shoot_collision_tochika(this.shoots[i].x , this.shoots[i].y , w , h)){

this.shoots.splice(i,1);

}

else if(this.shoot_collision_invader(this.shoots[i].x , this.shoots[i].y , w , h)){

this.shoots.splice(i,1);

}

else if(this.shoots[i].y < h){

this.shoots.splice(i,1);

}

else{

this.ctx.fillStyle = "white";

this.ctx.fillRect(this.shoots[i].x - __options.cannon.bitSize , this.shoots[i].y , w , h);

this.shoots[i].y -= __options.cannon.bitSize * 2;

}

};

MAIN.prototype.shoot_collision_invader = function(x , y , w , h){

var inv = __options.invaders;

for(var i in inv){

for(var j in inv[i]){

var ix = inv[i][j][0].x;

var iy = inv[i][j][0].y;

var iw = __options.bitmap_size.w;

var ih = __options.bitmap_size.h;

if(ix <= x && x <= ix + iw

&& iy <= y - h && y <= iy + ih){

for(var k=0; k<inv[i][j].length; k++){

inv[i][j][k].src = __options.invader_effect_1.src;

inv[i][j][k].shoot_flg = 1;

}

return true;

}

};

MAIN.prototype.shoot_collision_tochika = function(x , y , w , h){

for(var i in __options.tochikas){

var tx = __options.tochikas[i].x;

var ty = __options.tochikas[i].y;

var tw = __options.tochika.w;

var th = __options.tochikas[i].h;

if(tx <= x && x + w <= tx + tw

&& ty <= y + h && y <= ty + th){

return this.tochika_scrape_shoot(__options.tochikas[i] , x , y);

}

};

MAIN.prototype.tochika_scrape_shoot = function(tochika_data , shoot_x , shoot_y){

// 衝突したtochikaの下部分を検出

var x = shoot_x - tochika_data.x;

var y = shoot_y - tochika_data.y;

var dot_x = parseInt(x / tochika_data.bitsize , 10);

var dot_y = parseInt(y / tochika_data.bitsize , 10);

// 当たった座標のドット部分を選択

if(tochika_data.bitmap[dot_y][dot_x] == 1){

// 衝突箇所以下を削除

for(var i=tochika_data.bitmap.length-1; i>=dot_y; i--){

if(tochika_data.bitmap[i][dot_x] != 1){continue;}

var str = tochika_data.bitmap[i];

tochika_data.bitmap[i] = str.slice(0,dot_x).concat("0",str.slice(dot_x+1));

return true;

}

// for(var i=tochika_data.bitmap.length-1; i>=0; i--){

// console.log();

// if(tochika_data.bitmap[i][dot_x] != 1){continue;}

// // bitmapから下2ドット分を削除

// var str = tochika_data.bitmap[i];

// tochika_data.bitmap[i] = str.slice(0,dot_x).concat("0",str.slice(dot_x+1));

// // tochika_data.bitmap[i] = "000000000000000000000000";

// // tochika_data.bitmap[i-1][dot_x] = 0;

// return true;

// }

return false;

};

MAIN.prototype.cannon_move = function(pos){

if(pos < 0){

pos = 0;

}

else if(pos > this.canvas_elm.offsetWidth - __options.bitmap_size.w){

pos = this.canvas_elm.offsetWidth - __options.bitmap_size.w;

}

__options.cannon.x = pos;

};

MAIN.prototype.animation = function(){

this.clear();

this.nextPattern(300);

this.view();

this.animation_roop(30);

}

MAIN.prototype.nextPattern = function(frame_rate){

this.prev_time = this.prev_time || 0;

if((+new Date()) - this.prev_time < frame_rate){return}

this.prev_time = (+new Date());

this.pattern++;

if(this.pattern >= this.image_max){

this.pattern = 0;

}

this.invader_move();

};

MAIN.prototype.invader_move = function(){

// 左端の情報取得

var window_min = __options.invader_config.margin;

var window_max = this.canvas_elm.offsetWidth - __options.invader_config.margin;

var pos = this.invader_pos();

var move_x = __options.invader_config.move_x;

var move_y = 0;

var w = __options.bitmap_size.w;

// move y

if(typeof this.move_y_count !== "undefined" && this.move_y_count > 0){

this.move_y_count -= 1;

move_y = __options.invader_config.move_y;

move_x = 0;

}

// Dead end ->

else if(move_x > 0 && pos.max > window_max){

// move_x = window_max - pos.max;

this.move_y_count = 1;

__options.invader_config.move_x = -__options.invader_config.move_x;

move_x = 0;

move_y = __options.invader_config.move_y;

}

// <- Dead end

else if(move_x < 0 && pos.min < window_min){

// move_x = window_min - pos.min;

this.move_y_count = 1;

__options.invader_config.move_x = -__options.invader_config.move_x;

move_x = 0;

move_y = __options.invader_config.move_y;

}

this.invader_move_set(move_x , move_y);

};

// mode @ [min : 一番左端のinvaderの座標を取得 . max : 一番右端のinvaderの座標を取得]

MAIN.prototype.invader_pos = function(mode){

var min = null;

var max = null;

var inv = __options.invaders;

var w = __options.bitmap_size.w;

for(var i in inv){

for(var j in inv[i]){

if(min === null || min > inv[i][j][0].x){

min = inv[i][j][0].x;

}

if(max === null || max < inv[i][j][0].x + w){

max = inv[i][j][0].x + w;

}

if(mode === "min"){

return min;

}

else if(mode === "max"){

return max;

}

else{

return {min : min , max : max};

}

};

MAIN.prototype.invader_move_set = function(x,y){

var inv = __options.invaders;

var w = __options.bitmap_size.w;

for(var i in inv){

for(var j in inv[i]){

for(var k in inv[i][j]){

inv[i][j][k].x += x;

inv[i][j][k].y += y;

}

};

MAIN.prototype.set_imageMax = function(){

for(var i in __options.invader_src){

this.image_max = __options.invader_src[i].length;

break;

}

};

/* Event */

MAIN.prototype.event_set = function(){

new LIB().event(w , "click" , (function(e){this.click(e)}).bind(this));

new LIB().event(w , "keydown" , (function(e){this.keydown(e)}).bind(this));

new LIB().event(w , "keyup" , (function(e){this.keyup(e)}).bind(this));

new LIB().event(w , "mousemove" , (function(e){this.mousemove(e)}).bind(this));

new LIB().event(w , "touchmove" , (function(e){this.touchmove(e)}).bind(this));

new LIB().event(w , "touchend" , (function(e){this.touchend(e)}).bind(this));

};

MAIN.prototype.click = function(e){

this.shoot_add();

};

MAIN.prototype.shoot_add = function(){

if(this.shoots.length < 2){

this.shoots.push({

x : __options.cannon.x + (__options.bitmap_size.w / 2),

y : __options.cannon.y + (__options.cannon.bitSize * 4)

});

}

};

MAIN.prototype.keydown = function(e){

switch(e.keyCode){

case 37: // <-

case 'ArrowLeft':

this.keydown_flg = "left";

break;

case 39: // ->

case 'ArrowRight':

this.keydown_flg = "right";

break;

case 32: // space

this.shoot_add();

break;

}

};

MAIN.prototype.keyup = function(e){

this.keydown_flg = false;

};

MAIN.prototype.mousemove = function(e){

// if(this.flg_gamestart !== true){return;}

this.mousePos = this.mousePos || e.clientX;

this.cannon_move(__options.cannon.x + (e.clientX - this.mousePos));

this.mousePos = e.clientX;

};

MAIN.prototype.touchmove = function(e){

// if(this.flg_gamestart !== true){return;}

if(!e || !e.touches || e.touches.length > 1){

this.mousePos = null;

return;

}

this.mousePos = typeof this.mousePos === "number" ? this.mousePos : e.touches[0].clientX;

this.cannon_move(__options.cannon.x + (e.touches[0].clientX - this.mousePos));

this.mousePos = e.touches[0].clientX;

};

MAIN.prototype.touchend = function(e){

this.mousePos = null;

};

var LIB = function(){};

LIB.prototype.event = function(target, mode, func , flg){

flg = (flg) ? flg : false;

if (target.addEventListener){target.addEventListener(mode, func, flg)}

else{target.attachEvent('on' + mode, function(){func.call(target , window.event)})}

};

var AJAX = function(option){

if(!option){return}

var httpoj = this.createHttpRequest();

if(!httpoj){return;}

// var option = new MAIN().setOption(options);

var data = this.setQuery(option);

if(!data.length){

option.method = "get";

}

httpoj.open( option.method , option.url , option.async );

httpoj.setRequestHeader('Content-Type', option.type);

httpoj.onreadystatechange = function(){

if (this.readyState==4 && httpoj.status == 200){

option.onSuccess(this.responseText);

}

};

// FormData 送信用

if(typeof option.form === "object" && Object.keys(option.form).length){

httpoj.send(option.form);

}

// query整形後送信

else{

if(data.length){

httpoj.send(data.join("&"));

}

else{

httpoj.send();

}

};

AJAX.prototype.dataOption = {

url:"",

query:{},

querys:[],

data:{},

form:{},

async:"true",

method:"POST",

type:"application/x-www-form-urlencoded",

onSuccess:function(res){},

onError:function(res){}

};

AJAX.prototype.createHttpRequest = function(){

//Win ie用

if(window.ActiveXObject){

//MSXML2以降用;

try{return new ActiveXObject("Msxml2.XMLHTTP")}

catch(e){

//旧MSXML用;

try{return new ActiveXObject("Microsoft.XMLHTTP")}

catch(e2){return null}

}

//Win ie以外のXMLHttpRequestオブジェクト実装ブラウザ用;

else if(window.XMLHttpRequest){return new XMLHttpRequest()}

else{return null}

};

// URL-Queryの作成

AJAX.prototype.setQuery = function(option){

var data = [];

if(typeof option.datas !== "undefined"){

for(var key of option.datas.keys()){

data.push(key + "=" + option.datas.get(key));

}

if(typeof option.query !== "undefined"){

for(var i in option.query){

data.push(i+"="+encodeURIComponent(option.query[i]));

}

if(typeof option.querys !== "undefined"){

for(var i=0;i<option.querys.length;i++){

if(typeof option.querys[i] == "Array"){

data.push(option.querys[i][0]+"="+encodeURIComponent(option.querys[i][1]));

}

else{

var sp = option.querys[i].split("=");

data.push(sp[0]+"="+encodeURIComponent(sp[1]));

}

return data;

}

new LIB().event(w , "load" , function(){new MAIN("#mycanvas")});

})(window,document);

解説

トーチカは、敵からの攻撃を避ける重要な守りですが、今の所、敵から弾を発射する処理を作っていないので、後回しになっていましたが、自機からの弾発射でも崩れる処理を先に作っておくことで、作業を進めたいと思います。

今回のポイントは、トーチカは、画面サイズに応じて設置個数を変更しているんですが、他の表示キャラクタと違っている点は、ドット絵を消していくという作業です。

今回は自機なので、弾が当たった箇所のトーチカの下側から、座標を判定して、ドットを消していくという内容にしています。

難しかった点としては、canvasで表示してドット感を出すために、1ドット数ピクセルでの表示を、キャラクタの表示サイズに対するドット数の比率で計算しているので、どのドットに衝突しかたの計算も、単純ではありません。

bitsizeという、1ドットのサイズを、ドットデータの読み込み時にメモリに保持していたので、この値を使えばできるんですが、キレイな数字が返ってこないので、小数点切り捨てか、四捨五入してあげるといい感じになりました。

今回、プログラムサイズが、20kを超えていることに気がついたので（約700行）、共通関数などをライブラリ化した方がいいと感じました。

このブログ企画の目的でもある、共通ライブラリを作っていかなければいけませんね。

Github

ソースは以下にアップしています。(ver:0.9)

https://github.com/yugeta/game_invader

Program canvas, invader, JavaScript

Tips of Rubbish

DIYとIoTをこよなく愛する、WEB関連やデジモノなどの雑多な情報ブログ